/* -------------------------------------------------------------------------
 *
 * strlcpy.c
 *	  strncpy done right
 *
 * Portions Copyright (c) 1996-2009, PostgreSQL Global Development Group
 * Portions Copyright (c) 2010-2012 Postgres-XC Development Group
 *
 *
 * IDENTIFICATION
 *	  $PostgreSQL: pgsql/src/port/strlcpy.c,v 1.5 2008/01/01 19:46:00 momjian Exp $
 *
 * This file was taken from OpenBSD and is used on platforms that don't
 * provide strlcpy().  The OpenBSD copyright terms follow.
 * -------------------------------------------------------------------------
 */

/*	$OpenBSD: strlcpy.c,v 1.11 2006/05/05 15:27:38 millert Exp $	*/

/*
 * Copyright (c) 1998 Todd C. Miller <Todd.Miller@courtesan.com>
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

#include "cm/cm_c.h"
/*
 * Copy src to string dst of size siz.	At most siz-1 characters
 * will be copied.	Always NUL terminates (unless siz == 0).
 * Returns strlen(src); if retval >= siz, truncation occurred.
 * Function creation history:  http://www.gratisoft.us/todd/papers/strlcpy.html
 */
size_t strlcpy(char* dst, const char* src, size_t siz)
{
    char* d = dst;
    const char* s = src;
    size_t n = siz;

    /* Copy as many bytes as will fit */
    if (n != 0) {
        while (--n != 0) {
            if ((*d++ = *s++) == '\0') {
                break;
            }
        }
    }

    /* Not enough room in dst, add NUL and traverse rest of src */
    if (n == 0) {
        if (siz != 0)
            *d = '\0'; /* NUL-terminate dst */
        while (*s++) {
            continue;
        }

    }

    return (s - src - 1); /* count does not include NUL */
}
